Penetrating Fluids

July 2009

by Jim Morrison

Machinist’s Workshop magazine tested the effectiveness of different penetrating fluids for break out torque on rusted nuts and bolts.

 

They arranged a subjective test of the fluids using the torque required to remove the nut from a “scientifically rusted” environment.

 

The results of their tests were:

 

PENETRATING FLUID

 

 

 

AVERAGE BREAKAWAY TORQUE

None

 516 pounds

WD-40

238 pounds

PB Blaster

214 pounds

Liquid Wrench

127 pounds

Kano Aerokroil

106 pounds

ATF-Acetone mix

53 pounds

The ATF-Acetone mix was a 50/50 “home brew” of automatic transmission fluid and acetone.

 

Kind of makes you wonder about all those others, doesn’t it?